Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Virtual inertia direct power control method of direct current micro-grid

A DC microgrid and power control technology, which is applied in the direction of DC power input conversion to DC power output, DC power supply parallel operation, DC network circuit devices, etc. , affecting the dynamic performance of the system, etc., to achieve the effect of reducing the fluctuation range

Pending Publication Date: 2022-07-05
WUHAN MARINE ELECTRIC PROPULSION RES INST CHINA SHIPBUILDING IND CORP NO 712 INST
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The current research ignores the dynamic characteristics of the DC microgrid. It is rare to use dual active bridge converters to control the low-voltage DC bus voltage, resulting in a large fluctuation range of the low-voltage DC bus voltage, which affects the dynamic performance of the entire system.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Virtual inertia direct power control method of direct current micro-grid
  • Virtual inertia direct power control method of direct current micro-grid
  • Virtual inertia direct power control method of direct current micro-grid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0058] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0059] The invention discloses a virtual inertia direct power control method of a DC microgrid, which includes direct power control of dual active bridge converters, double closed-loop control of rectifiers and a virtual inertia control strategy of the DC microgrid. In this embodiment, the two-degree-of-freedom virtual inertia direct power control method when the DC microgrid with power electronic transformer is connected to the network includes the virtual inertia control of the DC microgrid, the rectifier control, and the direct power of the dual active bridge converter based on the minimum return power algorithm. control, the overall control diagram is as follows figure 1 shown.

[0060] The virtual inertia control of the DC microgrid is as follows figure 2 As shown in the figure, by means of sampling and other means, the photovoltaic...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a virtual inertia direct power control method for a direct-current micro-grid, and the direct-current micro-grid comprises a photovoltaic power generation unit, an energy storage unit, a rectifier connected with a public power grid, and a power electronic transformer comprising a dual-active bridge converter. The control method based on the virtual inertia of the direct-current micro-grid is adopted to indirectly control the transmission free degree of the dual-active-bridge converter in the power electronic transformer, and simple and flexible control over the system is achieved.

Description

technical field [0001] The invention belongs to the technical field of power conversion, and in particular relates to a virtual inertia direct power control method of a direct current microgrid. Background technique [0002] In recent years, with the development of technologies such as photovoltaic power generation, wind power generation, battery energy storage systems and electric vehicles, the traditional power grid is undergoing profound changes. As a key interconnection measure for renewable energy and distributed energy generation, the concept of microgrid has been successfully proposed and applied to traditional power grids. Among them, DC microgrid has received extensive attention due to its advantages such as simple control, low loss, and no reactive power and harmonic current. When the DC microgrid is connected to the grid, the traditional research uses the structure of the inverter combined with the traditional transformer to realize the grid-connected function, w...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H02J1/00H02J1/10H02J7/35H02M3/335
CPCH02J1/00H02J1/10H02J7/35H02M3/33584H02J2300/26
Inventor 李宇阳陈廷杨别瑜陈革姬凯
Owner WUHAN MARINE ELECTRIC PROPULSION RES INST CHINA SHIPBUILDING IND CORP NO 712 INST
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com